Lexical Definition

‎αὔριον‎ aúrion (ow'-ree-on) tomorrow ^G:ADV
from a derivative of the same as ‎ἀήρ‎ (meaning a breeze, i.e. the morning air)

(to-)morrow, next day.

• properly, fresh, i.e. (adverb with ellipsis of ‎ἡμέρα‎) to-morrow

Abbott-Smith

αὔριον adv., [in LXX for מָחָר;]
to-morrow: Mt 6:30, Lk 12:28, Ac 23:20 25:22, I Co 15:32, Lk 13:32, 33, Ja 4:13; ἡ αὔ. (sc. ἡμέρα, MM, s.v.), Mt 6:34, Ac 4:3; ἐπὶ τὴν αὔ., Lk 10:35, Ac 4:5; τὸ (WH om.) τῆς αὔ. Ja 4:14.†

Abbott-Smith References

Liddell-Scott-Jones

αὔριον,

adverb to-morrow, [Refs 8th c.BC+]; αὔ. τηνικάδε tomorrow at this time, [Refs 5th c.BC+]; ἐς or εἰς αὔ. on the morrow, [Refs 8th c.BC+] (or till morning, [Refs 8th c.BC+]; for the morrow, καλέσαι ἐπὶ δεῖπνον εἰς αὔ.[Refs]

__2 presently, shortly, φάγωμεν καὶ πίωμεν, αὔ. γὰρ ἀποθνῄσκομεν[NT]; opposed to σήμερον, [NT]
__II substantive, αὔ. ἣν ἀρετὴν διαείσεται the morrow will distinguish.., [Refs 8th c.BC+]
__III ἡ αὔ. (i.e. ἡμέρα) the morrow, [αὔριον [prev. author] “fragment” 593.5; εἰς τὴν αὔ. 2nd c.AD: Alexander Rhetor 241.3, NT.Acts.4.3">NT+5th c.BC+]; ἐπὶ τὴν αὔ.[Refs 5th c.BC+]; ἡ Αὔ. personified by [Refs 5th c.BC+]. (Cf. Lithuanian aušrà 'dawn', Sanskrit usrás 'of the dawn'; see at {ἄγχαυρος},{ἕως}.)

_{LSJ Scripture Refs: 1Cor.15.32 ☩ Matt.6.30 ☩ Acts.4.3}